- 8 - property”. Petitioner assigned error to that determination and argues on brief that, for various reasons, it is incorrect. We need not address the questions raised by petitioner with respect to section 897, however, because we find that petitioner did not omit from gross income a sufficient amount to trigger the 6-year limitations period found in section 6501(e)(1). II. Limitations on Assessment and Collection Section 6501(a) provides a general rule limiting to 3 years after a return is filed the time in which a tax may be assessed or a proceeding in court without assessment for collection begun. If a taxpayer omits from gross income an amount properly includable in gross income that is in excess of 25 percent of the amount of gross income stated in the return, the period for assessment or a proceeding in court without assessment for collection is extended to 6 years. Sec. 6501(e)(1). A claim that the period for assessing the tax has expired is an affirmative defense, and the party raising it must plead it and carry the burden of proving its applicability. Rules 39, 142(a). Petitioner has satisfied the pleading requirement. Moreover, the parties have stipulated that the 1989 return was filed with respondent’s Philadelphia Service Center on May 29, 1990, and that the notice of deficiency in this case is dated May 22, 1996. Petitioner has, thus, made a prima facie case that the 3-year period of section 6501(a) has expired, and the burden of going forward with the evidence to show some applicablePage: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Next
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